<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
        <link rel="shortcut icon" href="https://avatar.moonshot.cn/avatar/cmri3mecp7fdvr21ch3g">
    <link rel="stylesheet" href="teststyle.css">
</head>
<body>

<iframe src="https://www.huaban.com" width="500" height="500" name="myIframe"></iframe>
<br/>
<a href="css_test.html" target="myIframe">Go to CSS test page in iframe</a>
<br/>
<a href="iframe_test.html" target="myIframe">Go back to iframe test page</a>

</body>
</html>